Perhaps you should try some spelling variations:
bach thuoc » bach tuoc, cach thuc, hanh thuoc
thieu bien » thieu nien, tieu bieu, hien bien
ban thuoc » dang thuoc, cay thuoc, nam thuoc
cua tre » cua te, cua triet, dua tren
hanh di » hanh vi, hanh de, hang di
va hanh » van hanh, va thanh, va danh
so sach » so sanh, bo sach, co sach
nang xa » nang x, lang xa, nang ma
cuu tre » cau tren, cau treo
y nang » ky nang, ly nang, v nang

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: so sach y nang xa hoi. thieu bien ((bach thuoc) OR (ban thuoc)) va hanh di ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach y nang xa hoi. thieu bien ((bach thuoc) OR (ban thuoc)) va hanh di ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach y nang xa hoi. thieu bien ((bach thuoc) OR (ban thuoc)) va hanh di ((cua tre) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: so sach y nang xa hoi. thieu bien ((bach thuoc) OR (ban thuoc)) va hanh di ((cua tre) or (cuu tre))*.